/*
 * Copyright (C) 2017 Fabian Terhorst
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file kt in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.fabianterhorst.isometric.shapes;

import io.fabianterhorst.isometric.Path;
import io.fabianterhorst.isometric.Point;
import io.fabianterhorst.isometric.Shape;

/**
 * Octahedron Class.
 *
 * @since 03.03.21
 */
public class Octahedron extends Shape {
    /**
     * Constructor
     *
     * @param origin {@link Point}
     */
    public Octahedron(Point origin) {
        super();
        Point center = origin.translate(0.5, 0.5, 0.5);
        Path upperTriangle = new Path(new Point[] {
            origin.translate(0, 0, 0.5), origin.translate(0.5, 0.5, 1), origin.translate(0, 1, 0.5)
        });
        Path lowerTriangle = new Path(new Point[] {
            origin.translate(0, 0, 0.5), origin.translate(0, 1, 0.5), origin.translate(0.5, 0.5, 0)
        });
        Path[] paths = new Path[8];
        int count = 0;
        for (int i = 0; i < 4; i++) {
            paths[count++] = upperTriangle.rotateZ(center, i * Math.PI / 2.0);
            paths[count++] = lowerTriangle.rotateZ(center, i * Math.PI / 2.0);
        }
        setPaths(paths);
        scalePaths(center, Math.sqrt(2) / 2.0, Math.sqrt(2) / 2.0, 1);
    }
}